冠心病介入治疗(PCI)用金属普通支架取代球囊扩张, 使支架内再狭窄(ISR)近50％下降到20％-30％;药物涂层支架,在防止支架内再狭窄及再次血运重建术(Repeat．revas- culazation)明显优于金属普通支架。近年药物洗脱支架 (DES drug electing stent)问世,使支架内再狭窄率下降至 10％以下,成为介入冠心病学发展最快的领域之一,被称为 Coronary heart disease interventional therapy (PCI) with metal stent instead of balloon dilatation, intra-stent restenosis (ISR) decreased by 50% to 20% -30%; drug-coated stent, to prevent in-stent restenosis and re-blood supply Repeat.revas- culazation is significantly better than the metal common stent. In recent years, the advent of drug-eluting stents (DES drug electing stent), the stent restenosis rate dropped to 10% or less, becoming involved in coronary heart disease one of the fastest-growing areas, known as